/*

* Copyright (C) 2014 BlueKitchen GmbH

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

*

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* 3. Neither the name of the copyright holders nor the names of

* contributors may be used to endorse or promote products derived

* from this software without specific prior written permission.

* 4. Any redistribution, use, or modification is done solely for

* personal benefit and not for any commercial purpose or for

* monetary gain.

*

* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS

* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN

* GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF

* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

* SUCH DAMAGE.

*

* Please inquire about commercial licensing options at

* contact@bluekitchen-gmbh.com

*

*/

#define BTSTACK_FILE__ "hsp_hs_demo.c"

/*

* hsp_hs_demo.c

*/

// *****************************************************************************

/* EXAMPLE_START(hsp_hs_demo): HSP HS - Headset

*

* @text This example implements a HSP Headset device that sends and receives

* audio signal over HCI SCO. It demonstrates how to receive

* an output from a remote audio gateway (AG), and,

* if HAVE_BTSTACK_STDIN is defined, how to control the AG.

*/

// *****************************************************************************

#include "btstack_config.h"

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "btstack.h"

#include "sco_demo_util.h"

#ifdef HAVE_BTSTACK_STDIN

#include "btstack_stdin.h"

#endif

static btstack_packet_callback_registration_t hci_event_callback_registration;

static uint8_t hsp_service_buffer[150];

static const uint8_t rfcomm_channel_nr = 1;

static const char hsp_hs_service_name[] = "Headset Test";

static hci_con_handle_t sco_handle = HCI_CON_HANDLE_INVALID;

static char hs_cmd_buffer[100];

// mac 2013:

static const char * device_addr_string = "84:38:35:65:d1:15";

static bd_addr_t device_addr;

/* @section Audio Transfer Setup

*

* @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz.

* To send and receive an audio signal, ENABLE_SCO_OVER_HCI has to be defined.

*

* Tested working setups:

* - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud

* - Ubuntu 14 64-bit, CSR USB dongle

* - OS X 10.11, CSR USB dongle

*

* Broken setups:

* - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud

* - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio

* - looks like bug in select->FTDI driver as it works correct on Linux

*

* SCO not routed over HCI yet:

* - CSR UART dongle

* - Broadcom USB dongle

* - Broadcom UART chipset

* - ..

*

*/

static void show_usage(void){

bd_addr_t iut_address;

gap_local_bd_addr(iut_address);

printf("\n--- Bluetooth HSP Headset Test Console %s ---\n", bd_addr_to_str(iut_address));

printf("---\n");

printf("c - Connect to %s\n", bd_addr_to_str(device_addr));

printf("C - Disconnect\n");

printf("a - establish audio connection\n");

printf("A - release audio connection\n");

printf("b - press user button\n");

printf("z - set microphone gain 0\n");

printf("m - set microphone gain 8\n");

printf("M - set microphone gain 15\n");

printf("o - set speaker gain 0\n");

printf("s - set speaker gain 8\n");

printf("S - set speaker gain 15\n");

printf("\n");

}

#ifdef HAVE_BTSTACK_STDIN

static void stdin_process(char c){

switch (c){

case 'c':

printf("Connect to %s\n", bd_addr_to_str(device_addr));

hsp_hs_connect(device_addr);

break;

case 'C':

printf("Disconnect.\n");

hsp_hs_disconnect();

break;

case 'a':

printf("Establish audio connection\n");

hsp_hs_establish_audio_connection();

break;

case 'A':

printf("Release audio connection\n");

hsp_hs_release_audio_connection();

break;

case 'z':

printf("Setting microphone gain 0\n");

hsp_hs_set_microphone_gain(0);

break;

case 'm':

printf("Setting microphone gain 8\n");

hsp_hs_set_microphone_gain(8);

break;

case 'M':

printf("Setting microphone gain 15\n");

hsp_hs_set_microphone_gain(15);

break;

case 'o':

printf("Setting speaker gain 0\n");

hsp_hs_set_speaker_gain(0);

break;

case 's':

printf("Setting speaker gain 8\n");

hsp_hs_set_speaker_gain(8);

break;

case 'S':

printf("Setting speaker gain 15\n");

hsp_hs_set_speaker_gain(15);

break;

case 'b':

printf("Press user button\n");

hsp_hs_send_button_press();

break;

default:

show_usage();

break;

}

}

#endif

static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size){

UNUSED(channel);

uint8_t status;

switch (packet_type){

case HCI_SCO_DATA_PACKET:

// forward received SCO / audio packets to SCO component

if (READ_SCO_CONNECTION_HANDLE(event) != sco_handle) break;

sco_demo_receive(event, event_size);

break;

case HCI_EVENT_PACKET:

switch (hci_event_packet_get_type(event)) {

case BTSTACK_EVENT_STATE:

if (btstack_event_state_get_state(event) != HCI_STATE_WORKING) break;

show_usage();

break;

case HCI_EVENT_SCO_CAN_SEND_NOW:

sco_demo_send(sco_handle);

break;

case HCI_EVENT_HSP_META:

switch (hci_event_hsp_meta_get_subevent_code(event)) {

case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE:

status = hsp_subevent_rfcomm_connection_complete_get_status(event);

if (status != ERROR_CODE_SUCCESS){

printf("RFCOMM connection establishment failed, status 0x%02x\n", status);

} else {

printf("RFCOMM connection established.\n");

}

break;

case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE:

printf("RFCOMM disconnected.\n");

break;

case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE:

status = hsp_subevent_audio_connection_complete_get_status(event);

if (status != ERROR_CODE_SUCCESS){

printf("Audio connection establishment failed, status 0x%02x\n", status);

} else {

sco_handle = hsp_subevent_audio_connection_complete_get_sco_handle(event);

printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle);

hci_request_sco_can_send_now_event();

}

break;

case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE:

printf("Audio connection released.\n\n");

sco_handle = HCI_CON_HANDLE_INVALID;

break;

case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED:

printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event));

break;

case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED:

printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event));

break;

case HSP_SUBEVENT_RING:

printf("HS: RING RING!\n");

break;

case HSP_SUBEVENT_AG_INDICATION: {

memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer));

unsigned int size = hsp_subevent_ag_indication_get_value_length(event);

if (size >= sizeof(hs_cmd_buffer)-1){

size = sizeof(hs_cmd_buffer)-1;

}

memcpy(hs_cmd_buffer, hsp_subevent_ag_indication_get_value(event), size);

printf("Received custom indication: \"%s\". \nExit code or call hsp_hs_send_result.\n", hs_cmd_buffer);

break;

}

default:

printf("event not handled 0x%02x\n", hci_event_hsp_meta_get_subevent_code(event));

break;

}

break;

default:

break;

}

default:

break;

}

}

/* @section Main Application Setup

*

* @text Listing MainConfiguration shows main application code.

* To run a HSP Headset service you need to initialize the SDP, and to create and register HSP HS record with it.

* In this example, the SCO over HCI is used to receive and send an audio signal.

*

* Two packet handlers are registered:

* - The HCI SCO packet handler receives audio data.

* - The HSP HS packet handler is used to trigger sending of audio data and commands to the AG. It also receives the AG's answers.

*

* The stdin_process callback allows for sending commands to the AG.

* At the end the Bluetooth stack is started.

*/

/* LISTING_START(MainConfiguration): Setup HSP Headset */

int btstack_main(int argc, const char * argv[]);

int btstack_main(int argc, const char * argv[]){

(void)argc;

(void)argv;

sco_demo_init();

sco_demo_set_codec(HFP_CODEC_CVSD);

l2cap_init();

#ifdef ENABLE_BLE

// Initialize LE Security Manager. Needed for cross-transport key derivation

sm_init();

#endif

sdp_init();

memset(hsp_service_buffer, 0, sizeof(hsp_service_buffer));

hsp_hs_create_sdp_record(hsp_service_buffer, sdp_create_service_record_handle(), rfcomm_channel_nr, hsp_hs_service_name, 0);

btstack_assert(de_get_len( hsp_service_buffer) <= sizeof(hsp_service_buffer));

sdp_register_service(hsp_service_buffer);

rfcomm_init();

hsp_hs_init(rfcomm_channel_nr);

// register for HCI events and SCO packets

hci_event_callback_registration.callback = &packet_handler;

hci_add_event_handler(&hci_event_callback_registration);

hci_register_sco_packet_handler(&packet_handler);

// register for HSP events

hsp_hs_register_packet_handler(packet_handler);

#ifdef HAVE_BTSTACK_STDIN

btstack_stdin_setup(stdin_process);

#endif

gap_set_local_name("HSP HS Demo 00:00:00:00:00:00");

gap_discoverable_control(1);

gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO);

gap_set_class_of_device(0x240404);

// Parse human readable Bluetooth address.

sscanf_bd_addr(device_addr_string, device_addr);

// turn on!

hci_power_control(HCI_POWER_ON);

return 0;

}

/* LISTING_END */

/* EXAMPLE_END */